<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>position_relative.html</title>
<link rel='stylesheet' href='../css/position_relative.css'>
</head>
<body>
<div id='p'>
      <div id="c1">c1</div>
      <div id="c2">c2</div>
      <div id="c3">c3</div>
      <div id="c4">c4
      </div>
</body>
</html>